BLEEDING AND COAGULATION IN SOME BERMUDAN CRUSTACEA

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Abstract
Maximum bleeding volumes and coagulum wts. were detd. using more than 150 individuals of 12 spp. of Bermudan crustaceans. Avg. bleeding volumes ranged from 3.8 in Eupanopeus to 16.9 in Scyllarides and averaged 7.2 cc/100 g. Avg. values for the wt. of the extracted and dried coagulum representing the sum of fibrin and cellular constituents ranged from 3.6 g./l. in Plagusia to 18.1 g./l. in Panulirus with large individual variation in most spp. Even in animals previously considered to possess only an "initial," cellular phase of coagulation, the coagulum weights were 3-8 times greater than the estimate of the max. cellular contribution and it was concluded that plasma components must be of importance in these spp. In spp. possessing considerable amts. of fibrinogen a "fine-structured" clot is formed resembling that in lower vertebrates rather than that in mammals. The mechanical properties of this clot compare favorably to the mammalian clot but require 3-6 times as much fibrinogen.

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